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EP 3 973 452 A1

(12)

(43) Date of publication: 30.03.2022 Bulletin 2022/13 (21) Application number: 19753572.7 (22) Date of filing: 05.08.2019

(51) International Patent Classification (IPC):  G06K 9/62(2022.01) (52) Cooperative Patent Classification (CPC): G06K 9/6232; G06V 10/759 (86) International application number: PCT/US2019/045089 (87) International publication number: WO 2021/025677 (11.02.2021 Gazette 2021/06)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (71) Applicant: Google LLC Mountain View, CA 94043 (US)

(72) Inventors: TU, Jilin Mountain View, California 94043 (US) WANG, Jiang Mountain View, California 94043 (US) CHEN, Huizhong Mountain View, California 94043 (US) ZHU, Xiangxin Mountain View, California 94043 (US) DAI, Shengyang Mountain View, California 94043 (US) (74) Representative: Kennedy, Richard E. et al Venner Shipley LLP 5 Stirling House Stirling Road The Surrey Research Park Guildford GU2 7RF Guildford GU2 7RF (GB)